GameIndex.io is a curated list of the best web and mobile instant games - ones you can play without downloading! All games listed here are free to play and require no registration.
Most games on GameIndex.io are original free multiplayer .io games. Usually these quality free instant games are cross platform and playable on PC, Mac, Android and iOS mobile devices.
We only list the best games and experiences - you will not find fake online games that pretend to be real multiplayer here - like paper.io. We also do not believe in listing rip-offs and try to list the original games.
The Game Index is regularly updated to include the best free .io and other web and mobile instant games.